<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        p{
            color: red;
            font-size: 40px;  /*大小*/
        }
    </style>
</head>
<body>
     <p style="color: chartreuse;">hello world</p>
     <p>hello CSS</p>
     <h1 style="color: aqua; font-size: 80px;">hello sun</h1>
</body>
</html>